Screwed pipe connection DIN 11851

Application of threaded connections acc. DIN 11851:

Screwed pipe connection acc. DIN 11851 ("Fittings for food, chemical and pharmaceutical industry – Stainless steel screwed pipe connections - Design for rolling in and welding-on") are preferably used in food piping and beverage piping systems. These fittings are supplied with an easy-to-clean round thread to DIN 405.A complete fitting consists of:
  • threaded ferrule,
  • sealing,
  • conical ferrule and
  • nut.
The seal is inserted into the threaded socket. These are available in various materials and with corresponding approvals and are therefore not usually part of our scope of delivery. Depending on the nominal size, the nut has 4 to 6 grooves for actuation by means of a hook wrench.

Assembly of threaded connections acc. DIN 11851:

To assemble the screwed pipe connection, the sealing ring is inserted into the groove of the threaded ferrule, which automatically holds the sealing ring in place. The conical ferrule and the threaded ferrule are then connected so that they engage with each other and are thus centered. For a pressure-tight connection, the groove nut is slid over the conical ferrule and screwed to the threaded ferrule.

Dimensions of threaded connections acc. DIN 11851:

Characteristics of threaded connections according to DIN 11851:

Max. Operating pressure of the fitting: (when suitable seals are used)  
DN 10 - DN 40: max. 40 bar
DN 50 - DN 100 max. 25 bar
DN 125 - DN 150: max. 16 bar
Please also observe the application limits of the valve, fitting, pipe!

Threads acc. DIN 405:

For the threads DIN 405 is used. The most important dimensional data for these threads can be found in the table for DIN 405.

Additional data about valves and fittings with threads acc. DIN 11851:

KVT Quetschventil mit Milchrohrgewinde QV-630 und QV-635 IMG_2275 A

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